A large number of players have complained about overlapping buttons.
Mainly Windows Vista users seems to suffer from this, but also Windows XP users may experience this problem.
So I decided to make this small solution guide:

For Windows 7 users:
- Right click on an empty space in the desktop.
- Click 'Screen Resolution'
- Click on the 'Make text and other items larger or smaller' option
- Select 'Smaller - 100%'
- Click 'Apply' and you're done, you might have to reboot your computer or simply log off and log in again.